| A．Good morning. |
| B．Good afternoon. |
| C．Good bye. |
| D．See you. |
| A．Good bye, Sarah |
| B．See you, Sarah |
| C．My name is Wu Yifan |
| D．Nice to meet you, too |
| A．My name is Mike. |
| B．Nice to meet you,too. |
| C．See you. |
| D．This is Chen jie. |
| A. Nice to meet you, too. B. Here it is. C. OK. D. Nice to meet you. E. Good afternoon. |
| A．Nice to meet you. | B．Goodbye. |
| C．Here it is. | D．Hello. |
| A．Good afternoon. | B．Bye! |
| C．Good morning. | D．Good evening. |
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